/Engine/Source/Editor/SequencerCore/Public/MVVM/ViewModels/TrackAreaViewModel.h
typedef TMulticastDelegate_OneParam< void, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [ITrackAreaHotspot](API\Editor\SequencerCore\MVVM\Views\ITrackAreaHotspot) > > FOnTrackAreaHotspotChanged